Wrote letter of 1683-10-14 (AB 78) to Anthonie Heinsius

October 14, 1683
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Text of the letter in the original Dutch and in English translation from Alle de Brieven. The Collected Letters at the DBNL - De Digitale Bibliotheek voor de Nederlandse Letteren.

The original manuscript on one quarto page, written and signed by Leeuwenhoek, is preserved at the Rijksarchief (National Archive) in Den Haag (Inv. No. 13). The letter was not published during his lifetime.

Leeuwenhoek wrote this short reply to his friend Anthonie Heinsius's October 8 letter, which has not survived. It was not published until 1952 in Volume 4 of Alle de Brieven / Collected Letters.